A Dual Carb , cross-ram made the 413 unique, but it was the big, upswept exhaust manifolds and special heads with huge 2.08 intake valves that made this Mopar stand out. Available in two compression ratios, 11:1 and 13.5:1, the 413 produced 425 Horse Power and ran 12 Second quarter mile right from the showroom. In 1962 the NHRA Record Books four class records established by 413 Max Wedge Cars making this engine legendary.